Automatic cut-off machine.



AUTOMATIC CUT-OFF MACHINE.

APPLlcATloN FILED FEB.1.1916.

LQSQ latented May 15, 1917.

5 SHEETS-SHEET 2.

L. H. BRIGHTVIAN.

AUTOMATIC CUT-OFF MACHINE.

APPLICATION FILED FEB.I.19I6.

A11.p2@,330 Patented May 15, 1917.'

5 SHEETS-SHEET 3.

i?. Www/M L. H. BRIGHTMAN.

AUTOMATIC CUT-OFF MACHINE. APPLICATION FILED FEB. 7, 1916- L2693 Patented May 15, 1917.

5 SHEETS-SHEET 4.

L.. H.- BmGHTMAN. AuToMATlc cuT- oFF MACHINE.

APPLICATION FILED FEB; .7. 1916.

Patented May 15, 1917.

5 SHEETS-SHEET 5.

MSNM-w resuena.

i* IIATHAM H. :BRI(xIEI'lIliIAIN',v 0F COLUMBUS, OHIO.

AUTOMATIC CUT-OFF MACHINE.

Specification of Letters Patent.

Patented May 15, 11911?.

Y i Application filed February 7, 1916. Serial No. 76,814.

, MAN, a citizen of the United States, residing Aliti at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Automatic Cut- 0H? Machines, of which the following is a specification. v

This invention rela-tes to automatic cutoff machines to be used essentially in cutting short sections` of rods or shafting..

'There are a great number of .instances in which my machine may be used to advantage, one of them being particularly inthe use of roller bearings wherein short sections of steel rods are severed to uniform length.

The main object of my invention resides .in a type of structure ywherein the stop against which the steel rod or shafting is fed, is receded from its original position to permit the free dropping of the severed end after the cut-ofi tool has completed the severance. I have found that Where the stop is rigidly held in its original position, the severed end of the rod is apt to assume -an unnatural position at about the time the severance is completed and -in so doing places an unnatural strain upon the machine consequently the severed end tends to stop its rotation when the severance is completed, while the remalning stock bar continues its rotation and in this manner the so-called 'wedging action may readily take place.

'A further objectof my invention is the feedl mechanism used for forcing the stock bar into engagement with the stop above rcferred to, after the previous end of this stock bar has been severed and the cut-off tool withdrawn from its operative position. This feed mechanism comprises essentially a roll structure positively driven in suoli direction so that when it isy brought into engagement with the stock bar itself, after the stock bar has been temporarily released by the rotating chuck, the, action of the roll structure is such as to cause a forward feed of this stock bar into engagement with the stop to determine the next length of section to be severed.

The preferred embodiment of my invention is shown in the accompanying sheets of drawings, in which similar characters of reference designate corresponding parts, and in which:

Figure 1 is a longitudinal vertical section of thelassembled machine showing my improvements incorporated therein,

Fig. 2 is a top plan view ofthe structure shown in Fig.

Fig. 3 is a bottom plan looking up, of a portion of the structure shown in Fig. las

represented by the line 3 3 of Fig. l,

Fig. 4 is a view in side elevation of the feed mechanism for feeding the stock bar forward, Fig. 5 is a top plan view of the structure shown in Fig. at,

Fig. 6 is a view in perspective of a bushing forming a portion of the feed mechanism,

Fig. 7 is a partial plan view of the stop mechanism showing the structure by which it is regulated and its association with the mechanism for controlling the cut-off tools,

Fig. 8 is a side elevation of a portion of the structure shown to the extreme right of Fig. 7, f

Fig.` 9 is a longitudinal section taken through the rotatable chuck,

Fig. 1() is a section taken on line 10-10 of Fig. 9,

Fig. 11 is a view in perspective of a clamp ring forming a. portion of the rotatable chuck, and,

Fig. 12 is a section taken on line 12-12 of Fig. 9.

In these several views, the main frame or supporting framework of the structure is ydesignated in its entirety by the referonce numeral 1. The upper portionof this general framework carries a pair of bear ing supportsdesignated 2 and 3, in which the rotatable chuck shown in detail in Figs. 9 to 12 inclusive, is rotatably journaled, it being the purpose of this chuckto intermittently grasp the stock bar 4 to rigidly grip the same to cause its rotation at the same rotative speed as the chuck itself. Referring to Figs. 9 to 12 inclusive, it will be noted that the chuck comprises an outer sleeve 5 on which the pulleys G and- 7 are rigidly mounted.

This outer sleeve is threaded as is shown at 8 to accommodate the lock nuts shown at 9, whereby the sleeve itself is held against' longitudinal movement within the bearing 2, since these lock nuts eoperate with the enlarged portion of the sleeve. The rear end of the vsleeve is also threaded as is shown at 11, on to which portion the collar 12 is fsecured and this collar is then held in position by means of the lock nuts -enlarged flaring head 18 which head is designed tocoperate with a complementally inclined wearing member `19 located' within the enlarged portion 10 of the oute sleeve.

The slits 17 .'are provided to give a certain degree of resiliency'to the clamp ring and it will be apparent that should the inner sleeve 15 be forced toward the right` the flared head 18 will come into wedging engag'ement-with the inclined wearing member 19, whereby the sectional bushing 20 located within the lenlarged head 18 will be wedged into gripping relation with the stock bar. The dogs 14 are actuated by means of the cone shown at 21,` as being slidably mounted on the outer sleeve and as `actuated by means of a pair of levers 22 pivoted intermediate their ends, as shown at 23, to ears 24 projecting from the side of the bearing portion 3. The upper ends v`of the levers 22 are thus provided with pins 25 designedto slidein the grooved. portion 26 of the cone 21.

As has been related, the `structure of the machine is such that the chuck intermittently grasps and releases the stock bar 4 by the corresponding movement of the cone 21 upon the outer sleeve. At the time thatA the'stock Ibar isreleased. the feed mechanism shown in detail in Figs. 4 and 5 -comes into -play to force the stock bar forward to brlng its end into engagement With the stop shownat the right of Fig. 1. Also,

the arrangement and timing of the machine is such tha-t the stock bar is not released until the end of this bar previously fed 1 forward, has been completely severed by theI cut-off tools to be presently described. I This feed mechanism comprises a pair ofl levers 27 oppositely disposed to each other 5 to lie .on opposite sides of Jdie stock bar 4 andl pivoted intermediate their ends upon shaftsl 28 and 29, which shafts are rotatably supported in -a bearing bracket. 30 carried by the main framework of the machine. Oneend of each of these levers is formed with a bearing portion 31 in which shafts 32 and 33 are located and on one end of each of these shafts there is rigidly mounted tated and when the stock bar is released by the chuck, these rollers are brought into engagement with the stock bar and because of their rotation, feed the stock bar forward. The manner of rotating the rollers 34 is as follows: The rotatable chuck is provided with a gear 35-/which meshes with a pinion 36 mounted on a counter shaft 37, which shaft also carries a gear 38 at its opposite end. This latter gear 38 in turn meshes with a complemental 'pinion 39 located on the counter shaft 40 and the opposite end of this shaft 40 is provided with a spiral gear 41 -whiehmeshes with -a spiral gear 42 located on a shaft 43. This shaft 43 is then provided with a worm 44 which drives a worm wheel 45 located on a cam' shaft 46 to be presently referred to. In addition, the shaft 43 is provided with a gear 47 which forms a portion of the train of gearing shown in Fig. 4'for driving the rollers. This gear 47l in turn .drives av gear 48 located on al shaft 49 and this latter drives a gear 50 located on the shaft 29 already referred to.

shaft 33 and also the gear 52 located on the shaft .28. This latterA gear is 'also tained in mesh with. their complemental` gears 50 and 52 and becausek the gears 50 and 52 mesh with eachother, the roll shafts The gear 50 -then in turn drives the gear 51 locatedon the roller 32 and 33 willv rotate in opposite directions *i `with respect to each` other. The rearie'nd yof each of the levers 27 is connected to a carriage 54 by means of a link connec# tion 55 adjustable by means of the nuts 56,- the link itself being a threaded boltV threaded into 'the pivoted blocks 57. This ,carriage 54 is in turn slidably mounted on stub shafts 58, which latter project from and are. rigidly supported by the bracket v 30 already referred to.

The manner of bringing these rolls 34 into engagement withthe stock bar is as follows: To the carriage 54 there is rigidly secured a tie rod 59 whichiis adjustable as toV length by means ofthe structure shown at 60 and'which at its opposite end is connected with one of the levers 22, as shown at 61, used to actuate' the cone 21, which latter releases its gripon the stock bar. Thus, itl

will be apparent that as the cone 21 is moved toward the right,' as indicated in Figs. 1 and 9, the grip on the stock bar is released and at the same time the tie rod 59 is moved to the right tol cause a similar' movement of the carriage 54. Because of the link connections 55 with the levers 27, the grooved rolls vreferred to. of the shaft 46 through its connection efit will be apparent that it is impossible to bring these rolls into contacting engagement with the stock bar before it has been released by the rotatable chuck.

In order to prevent the stock bar from wabbling as the rolls 34 engage it, 1 have provided the bearing bracket 30 with an eX- tension 30a in which the bushing 80b shown in Fig. 6,` is adapted to fit. The internal bore of this bushing may be varied to accommodat'e various sizes of stock bars and the extension 30a is itself so constructed as to be in alinement with the normal position of the stock bar as it is fed in. In this manner, the stock bar is actuated before it engages the rolls 34 and so prevented from Wabbling at that point.

The manner of actuating the levers 22 l Will now be described: The lower ends of these levers22 are adjustablyconnected to a slide block 62 slidably mounted in the under portion of the bed plate through thel medium of an adjustable link shown at 63.

This slide block carries a roller 64 which operates in a groove 65 formed in a cam 66 which cam is located on the shaft 46 already Thus, the lcontinuous rotation fected by the worm wheel 46, will cause the operation ofboth the rotatable chuck and the in-feed mechanism.

The stop against which the stock bar is fed and its manner of operation, will now be described: This stop comprises a support 67 adjustably mounted on a rod 68 -by means of the boltsshown at 69. This rod is itself slidably mounted in a pair of brackets designated 70 and shown as being bolted to the main framework in any` desired manner. The i'ear end of the slide rod 68 is so formed as to be pivotally attached .as shown at 71 to a link 72 whichis in turn pivotally connected to a crank arm 73 rigidly mounted on a shaft 74. This shaft 74 is suitably journaled in a bracket 75 supported from the` mainframework and carries at its opposite side a lever arm 76 and this latter lever arm'is connected by means of a universal connection shown at 77 to a pull rod 78. This pull rod is then in turn pivoted by means of a universal connection shown at 79 to one end of a bell crank 80, which bell crank is rigidly connected with a shaft 81. This shaft 81 is rotatably journaled in an ear 82 forming a portion of the 86 which is in turn pivotally supported from a bracket 87 fromY the main framework, as shown at 88. The short arm of the bell crank 86 is provided with a slot 89 and in this slot one end of a link 90 is rigidly secured as is-shown at 91. The opposite end of this link 90 is pivotally connected as shown at 92 with a tie rod 93. Referring particularly to Fig. 7, it will be noted that this tie rod is pivotally connected at 94 with the lever arm 83 and the oppositeend of this tie rod, referring now to Fig. 3, is pivotally connected as shown. at 95l to a lever 96 pivoted intermediate its ends as shown at 97 to a bracket arm projecting from the main framework. The opposite end of this lever 96 is then operatively connected to the cut-off tool support 98 by means of the link shown at 99 and consequently the movement of the cut-oil' tool supported in this cut-olf tool support 98 is governed by the pivotal movement of the lever 96. As shown in Fig. 7, the bell crank rigidly mounted 'on the shaft 81, has one arm operatively `turn transmitted to the tie rod 93 by means 4of the link connection 90. The tie rod 93 moves the lever 96 to in turn' properly feed the tool support 98 and also moves the bell crank 80 through the medium of the lever connection 83, inasmuch as the tool support 100 is connected by the link 101 to the bell crank 80. Reference'to Fig. 7 will also show that as the tool supports 98 and 100 are moved toward the stock bar, the right hand end of the bell crank 80 is moved toward the right. This motion is transferred l by means of the connection 78 to the lever 76 and this lever then operates the shaft 74, which latter controls the movement of the crank 73 to withdraw the slide bar v68 through' the medium of the link connection 72. inasmuch as the stop support is rigidly mounted on the slide bar 68, this stop support will Vthenbe withdrawn from its engagement with the end of the stock bar as the cut-off -tools are fed into the stock bar This stop is also constructed to adjust the lengths of stock severed independently of the bolts 69. This construction comprises the threaded rod 102 fitted within the upper portion of the stop support 67 and is held may be moved to the desired position and in this manner very minute adjustments may be effected. n

From the foregolng description, taken in connection with the accompanying sheets of drawings, it will be apparent that I have predetermined len th and before the severance of"he end o this stock bar has been completed. Further, particularly novel means have beenv provided for feeding the stock bar forward into engagement with the stock.

'WhatIclaim, is:

1. A machineof the class described comprising a chuck to hold the metal stock bar, means for feeding the stock bar through said chuck, a stop against which the end of Said' stock bar is to abut, means for feeding said tool into and away from said stock bar, and means for withdrawing said stop in a longitudinal direction from its engaging contact with the end of said stock bar during the time the cut-0H tool is being fed into the bar.

2. A machine of the class described comprising a main frame, a chuck to hold the metal stock bar, means for feeding the stock bar through said chuck, a cut-off tool, -means for'feeding said tool into and away from said stock ar, a slide bar slidably supported in said framework, a stop support adjustablyI mounted on said slide bar, a stop memberadjustably supported in said member against which the end of the stock bar is fed, and means connected to saidslide bar to move it in a longitudinal direction towithdraw said stop member from engage# ment with the end of said-stock bar during the time said cut-olf tool is fed into the bar,

' said separation being complete before the lbar end is severed. A

' 3. A machine of the class described com-v l prising a chuck to holdthe metal stock bar,

- for feedin means for feeding the lstock bar through -said chuck, a-stop against which-the* end of the stock bar is fed,.a cut-off tool, means' said tool into and away from said stock ar, and means operable after the cut-olf -tool has started the cutting action for withdrawing the stop from engaging contact with theend of the' stockbar to permit they free fall of the severed end and fore the severance is completed.-

4. A machine of the class described'comrl prising a chuck 4to hold the metal stock bar, means for feeding the stock bar through said chuck, a cut-off tool, means for feeding said tool into and away from said stock bar,u

a stop against which the end of the stock bar is fed, and an Ioperative connection bef 5. In a machine` of the class'described a' chuck to hold the metal stock bar, means whereby said chuck temporarily releases said stock. bar, and means for' feeding the stock bar through said .chuck comprismg'x a roll, means for rotating said roll,'and means for bringing the rotating roll into engagement with the stock bar during the interval that it is released `by said chuck.

to be out of contact with the bar be- 6. -In a machine of the class described a chuck to hold the metal stock bar, means whereby said chuck temporarily releases said stock bar, and means for' feeding the stock bar through said chuck comprising a pair of pivoted levers arranged on opposite sides of thestock bar, rollers carried by said levers, means for rotating saidv rollers, and means for moving said levers to bring said rotating rollers yinto contact with thev stock bar during the intervalthat it is released by said chuck.

7. In a machine of the class Adescribed a -chuck to hold the metal stock bar, means whereby saidchuck temporarily releases -said stock bar, and means for feeding said stock bar through said'chnck comprising a f pair of levers pivoted intermediate their ends on opposite sidesvof thef/stock vharta roller carried by one end of each of said levers, means for rotating said rollers inopposite directions, a carriage mounted to vslide in a direction parallel with the direcl Y tion of movement of said stock bar, link connections 'between said carriage and said.

levers, and means for moving said carriage to bring said rollers into contact with sald stock bar-during the interval that it is released by said chuck.

A In testimon whereof Laix my signature in presence o two witnesses. LATHAM II. BRIGHTMAN.'

Witnesses: a

WALTER E. L. Boex, A. L. Pmims. 

